擅长:python、mysql、java
<p>使用<code>mean</code>和<a href="http://pandas.pydata.org/pandas-docs/stable/indexing.html#boolean-indexing" rel="noreferrer">^{<cd2>}</a>删除列:</p>
<pre><code>print (df.isnull().mean() * 100)
group 0.0
id 62.5
val 12.5
dtype: float64
</code></pre>
<hr/>
^{pr2}$